<template>
<el-container class="home-container">
  <!-- 头部区域 -->
  <el-header>
      <div>
          <img src="../assets/heima.png" alt="" />
          <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
  </el-header>
  <!-- 页面主体 -->
  <el-container>
    <!-- 左侧边栏 -->
    <el-aside :width="isCollapse?'64px':'200px'">
      <div class="toggle-button" @click="toggleCollapse">|||</div>
      <el-menu
      background-color="#333744"
      text-color="#fff"
      active-text-color="#409eff"
      unique-opened
      :collapse="isCollapse"
      :collapse-transition="false"
      :router="true"
      :default-active="activePath"
      >
      <!-- 一级菜单 -->
      <el-submenu :index="item.id+''" v-for="item in menulist" :key="item.id">
        <!-- 一级菜单的模板区 -->
        <template slot="title">
          <!-- 图标 -->
          <i :class="iconsObj[item.id]"></i>
          <!-- 文本 -->
          <span>{{item.authName}}</span>
        </template>

            <!-- 二级菜单 -->
            <el-menu-item
            :index="'/'+subItem.path"
            v-for="subItem in item.children"
            :key="subItem.id"
            @click="saveNavState('/'+subItem.path)"
            >
              <template slot="title">
              <!-- 图标 -->
                <i class="el-icon-menu"></i>
                <!-- 文本 -->
                <span>{{subItem.authName}}</span>
              </template>
            </el-menu-item>

      </el-submenu>
    </el-menu>
    </el-aside>
    <!-- 右侧主体 -->
    <el-main>
      <router-view></router-view>
    </el-main>
  </el-container>
</el-container>
</template>

<script>
export default {
  name: 'home',
  data () {
    return {
      menulist: [],
      iconsObj: {
        125: 'iconfont icon-user',
        103: 'iconfont icon-tijikongjian',
        101: 'iconfont icon-shangpin',
        102: 'iconfont icon-danju',
        145: 'iconfont icon-baobiao'
      },
      isCollapse: false,
      activePath: '' // 被激活的链接地址
    }
  },
  methods: {
    logout () {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    // 获取左侧菜单
    async getMenuList () {
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.$message.console.error(res.meta.msg)
      this.menulist = res.data
      // console.log(res)
    },
    toggleCollapse () {
      this.isCollapse = !this.isCollapse
    },
    // 保存链接的激活状态
    saveNavState (activePath) {
      window.sessionStorage.setItem('active', activePath)
      this.activePath = activePath
    }
  },
  created () {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('active')
  }
}
</script>

<style lang="less" scoped>
.home-container {
    height: 100%;
}

.el-header {
    background-color: #373d41;
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    align-items: center;
    color: #fff;
    font-size: 20px;
    >div {
        display: flex;
        align-items: center;
        span {
            margin-left: 15px;
        }
    }
}

.el-aside{
    background-color: #333744;
    .el-menu{
      border-right: none;
    }
}

.el-main{
    background-color: #eaedf1;
}

.iconfont {
  margin-right: 10px;
}

.toggle-button {
  background-color: #4a5064;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>
